Clamp and bench-dog.



No-. ,7 I Patented A r. 9, Bill. .1. F. SIPPLE.

CLAMP AND BENCH D06.

FIG. 1.

WITNESSES: INVENTOR:

JflMES-FS/PPLE THE ucams Perms co. moropmo. wnsmncrcm u c.

No. 67l ,733. Patented Apr. 9, I91".

J. F. SIPPLE.

CLAMP AND BENCH D06.

(Applicntion filed June 7, 1898.) (lo Nodal.) 2 Sheets-Shut 2.

FIG. 5.

WITNESSES: lNvENTOR:

I JflMESFS/PPLE v m: scams PETERS coy. PHOTO-H1110. wasnmn'rou. u. c

UNITED STATES PATENT OFFICE.

JAMES F. SIPPLE, OF FREDERIGA, DELAWARE.

CLAMP AND BENCH-DOG.

SPECIFICATI N forming part of Letters Patent No. 671,733, dated April 9,1901.

Application filed January 7. 1899. Serial No. 719,670. N0 model.)

To all whom it may concern.-

Be it known that 1, JAMES F. SIPPLE, of Frederica, Delaware, haveinvented certain new and useful Improvements in Clamps and BenchDogs,whereof the following is a specification, reference being had to theaccompanying drawings.

My invention relates to devices used by carpenters and joiners inconnection with a workbench to secure material to be manipulated uponthe latter; and it is the object of my invention to provide such adevice with opposed jaws which may be opened and closed with respect tothe material operated upon and may also be adjustably raised and loweredwith respect to the bench upon which the device is fixed.

In the accompanying drawings, Figure l. is a plan view of a deviceconveniently embodying my invention. Fig. 2 is a sectional view of saiddevice, taken on the line 2 2 in Fig. 1. Fig. 3 is an inverted sectionalplan view of said device. Fig. 4 is a side elevation of theescutcheon-plate shown in section in Fig. 3. Fig. 5 shows a modifiedarrangement of the clamping-jaws. Fig. 6 shows an adjusting-screwadapted for the form of my invention shown in Fig. 5.

In said figures, A is the top plate of the exterior casing, which may befixed in the workbench flush with the top thereof. Thedownwardly-depending vertical side walls A and end wall A of said casinginclose a pair of clamping-jaws B, which are hingedly connected at b andarranged to slide vertically in the casing, with their hinged endsseated in the depression 0!, in the casing-wall A Between said jaws isthe central web A of the casing, which serves to support the materialclamped by said jaws, said web being secured to the casing cross-bar Aby the screw (1 and to the top of the casing by the tang a Said jaws Bmay be adjusted vertically to any predetermined height by means of theplunger 0, whose head a engages the recesses 19 in said jaws. Saidplunger is mounted for vertical reciprocation in the bottom cross-bar Aof the casing and is provided with the spring 0', adapted to thrust thejaws upwardly when released. The collar 0 may be set by the screw 0 atany desired position upon said plunger 0 to limit the vertical movementof the jaws B. I also find it convenient to limit the movement of saidjaws B by providing one of them with a down wardly-depending stem b uponwhich the collar b may be adjustably secured by means of the set-screw19 The jaws B comprise outwardly flared flanges B, which may be used tooverhang and clamp material down upon the bench. Said flanges areserrated at b to secure ma terial abutted against the jaws, and theserrated ridges b upon the inner faces of the jaws serve to engage thematerial clamped thereby. The free edges B of said jaws B are in everyposition of their vertical adjustment in respective engagement with the0ppositely-threaded extremities of the screw D, so that rotation of saidscrew in one direction or the other serves to oscillate said jaws towardor away from each other to clamp or release material placed betweenthem. Said screw D, being mounted for rotation in the side walls A ofthe casing, with its journals (1 bearing upon the edges of the slots atin said walls, may be conveniently rotated in either direction by meansof the key E, which is entered through the escutcheon-plate F, securedin the side of the work-bench in the relation shown in Fig. 3. The jawsB are secured in adjusted position and the accidental rotation of thescrew D prevented by means of the clutch-plate G, whose curved face 9rests against said screw opposite to said jaws. Said clutch-plate isupheld in the position shown in Fig. 2 by the engagement of its prongsgin recesses in the boss A of the casing, the wings g of said platebeing also loosely seated in the side walls A. Said plate may be forcedtightly against the screw D bymeans of the wedge-block H, which ismounted for vertical reciprocation in the boss A and may beverticallyadjusted by means of the screw I.

The operation of my device is as follows:

The parts having been freed for adjustment by loosening the screw 1, thejaws B may be vertically adjusted to any desired position bymanipulation of the plunger 0 and the jaws being oscillated by rotationof the screw D to effect the desired clamping action. The screw I isrotated in such direction as to raise the wedge-block H, thereby forcingthe clutchplate G against the screw D and thrusting the latter againstthe free edges B of the jaws B until the parts are rigidly secured inthe adin Fig. 5, and for this form of my invention I provide theadjusting-screw D, (shown in Fig. 6,) the outline of theoppositely-threaded extremities of said screw being separately curved incorrespondence with the respective curved paths of the jaws B In thelatter form of my invention I find it convenient to broaden the web A asindicated in Fig. 5.

I do not desire to limit myself to the precise construction andarrangement of my invention which I have herein set forth, as it isobvious that various modifications may be made therein without departingfrom the essential features of my invention.

I claim 1. The combination with a frame and pivoted jaws mountedtherein, of a bar or support disposed between the jaws and secured tothe frame and a tooth projecting from one end of said bar or support andengaging the frame.

2. The combination with a frame and jaws disposed therein pivotedtogether at one end, of a rod or bar mounted in the frame and having ahead loosely connect-ed with the lower end of said jaws.

3. The combination with a frame and jaws disposed therein pivotedtogether at one end, of a rod or bar mounted in the frame and having ahead loosely connected with the lower end of said jaws and a springencircling said rod or bar and hearing at its respective ends againstthe head thereon and the frame.

4:. The combination with a frame, jaws mounted therein and pivotedtogether at one end and a screw engaged by said jaws for moving them, ofa clutch adapted to engage said screw, a socketed enlargement on theframe, a beveled block mounted in said socketed enlargement and adaptedto engage the clutch and a screw for moving said beveled block tooperate the clutch.

5. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of opposed oscillatory jaws, mounted in said casing,means to raise and lower said jaws with respect to said casing, means tooscillate said jaws, and means to secure said jaws in adjusted.position, substantially as set forth.

6. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of opposed jaws, mounted to swing horizontally uponbearings vertically disposed in said casing, means to shift said jawsvertically with respect to said casing, means to oscillate said jaws,horizontally within said casing, and independent means to secure saidjaws in predetermined vertical and horizontal relation with said casing,substantially as set forth.

'7. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of jaws mounted in said casing, to oscillate uponvertical bearings, at one end there-- of, and a member extending betweenthe free ends of said jaws in fixed relation with said casing, adaptedto support the material engaged by said jaws, substantially as setforth.

8. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of opposed oscillatory jaws, mounted in saidcasing,-means to raise and lower said jaws with respect to said casing,comprising a spring adapted to uplift said jaws, and means topredetermine the extent of thrust of said spring, substantially as setforth.

9. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of opposed oscillatory jaws, mounted in said casing,means to simultaneously oscillate said jaws, comprising a screwreversely threaded for engagement with the respective jaws, and means tosecure said jaws, in adjusted position, substantially as set forth.

10. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of opposed oscillatory jaws, mounted to reciprocatevertically in said casing, means to simultaneously oscillate said jaws,comprising a screw reversely threaded for engagement with the respectivejaws,and means to secure said jaws, in adjusted position, substantiallyas set forth.

11. In a clamp and bench-dog, the combination with a stationary exteriorcasing, of a pair of opposed oscillatory jaws, mounted in said casing,means to simultaneously oscillate said jaws, comprising a screwreversely threaded for engagement with the respective jaws, and a memberadapted to bear upon said screw, and prevent the rotation thereof,substantially as set forth.

. JAMES F. SIPPLE.

Witnesses:

CHARLES F. ZIEGLER, JOSEPH F. ONEILL.

